Enable black/whitelists for mailgroups
Mailgroups currently simply forward mail to all its members. When forwarding, spam rules do not apply. Hence the black/whitelist settings are also ignored.
At least we should be able to only allow mailgroups to be used from internal accounts, so that mailgroups are not an easy target for spammers.
Thank you for your input! We will consider this functionality in upcoming releases if it is popular. Everyone, please continue voting for this feature if you consider it important.